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D Question 15 2 pts Otzi the Iceman, a corpse found preserved in ice in the Italian/Austrian Alps, is thought to have died around the year 3200 B.C. If the half-life of carbon-14 is 5730 years, about what percentage of his original carbon-14 remains today? The proportion of a substance that remains after a certain number of half-lives is given by the following: (0.5)n where n is the number of half-lives elapsed. O 53% O 87% O 48% O 76% O 9% D Question 16 2 pts Find the approximate radiation dose (in mSv) for 0.1 Gy exposure to thermal neutrons. (Hint: relative biological effectiveness for various types of radiation can be found in Table 32.2 in the text.) A range of answers is acceptable